Analysis

  • max time kernel
    149s
  • max time network
    101s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    24-02-2023 01:42

General

  • Target

    b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab.exe

  • Size

    312KB

  • MD5

    a64c4c4083e817d1b75536c30dd0ce5e

  • SHA1

    a4667b3ae9b83bc12f9d53543c41783b343afac3

  • SHA256

    b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab

  • SHA512

    fa39341ae0d245459174707c4dfd5fa4830e26eb7b58a1c81395977a27536ef1813bc42c2536556901a8a9cb238bd88b081df602f4d2a5242c95320d55d80d8f

  • SSDEEP

    6144:E4PWLN3m+XeeqeO0UQeQ8KbLVHqAQg5jIQs8EPn:6aeqeO0UQB8KFHqAY8EPn

Malware Config

Signatures

  • Detects PseudoManuscrypt payload 8 IoCs
  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • PseudoManuscrypt

    PseudoManuscrypt is a malware Lazarus’s Manuscrypt targeting government organizations and ICS.

  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 22 IoCs
  • Script User-Agent 1 IoCs

    Uses user-agent string associated with script host/environment.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Windows\system32\services.exe
    C:\Windows\system32\services.exe
    1⤵
      PID:460
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs
        2⤵
        • Suspicious use of NtCreateUserProcessOtherParentProcess
        • Suspicious use of SetThreadContext
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:836
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k WspService
        2⤵
        • Drops file in System32 directory
        • Checks processor information in registry
        • Modifies data under HKEY_USERS
        • Modifies registry class
        • Suspicious behavior: GetForegroundWindowSpam
        PID:1640
    • C:\Users\Admin\AppData\Local\Temp\b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab.exe
      "C:\Users\Admin\AppData\Local\Temp\b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab.exe"
      1⤵
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1072
      • C:\Users\Admin\AppData\Local\Temp\b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab.exe
        "C:\Users\Admin\AppData\Local\Temp\b9a81253d85a5da410ec8cf345c2444ec09739e5c9842e4031195209bacbf8ab.exe" -h
        2⤵
        • Suspicious use of SetWindowsHookEx
        PID:1700
    • C:\Windows\system32\rundll32.exe
      rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
      1⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:1740
      • C:\Windows\SysWOW64\rundll32.exe
        rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
        2⤵
        • Loads dropped DLL
        • Modifies registry class
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1240

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\db.dat

      Filesize

      557KB

      MD5

      f1f63fb8caa7c9447692fe4dc35dce65

      SHA1

      ea4816ff6db602728e97c990c4e71822e262e87c

      SHA256

      67e6fcfa88fcfe4fa1c87671567bd8bcf3cb2f79a5cb88173552b2222bbd27d2

      SHA512

      e5984aa82fd76ebe9804678b722ca416c9a890bab10d20a0f0e2a9b348f86ac3da4c210ddb5bd09ecf489ac90cc9f8d1939a489a242fe436a3af84c09743aed5

    • C:\Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

      Filesize

      61KB

      MD5

      fc4666cbca561e864e7fdf883a9e6661

      SHA1

      2f8d6094c7a34bf12ea0bbf0d51ee9c5bb7939a5

      SHA256

      10f3deb6c452d749a7451b5d065f4c0449737e5ee8a44f4d15844b503141e65b

      SHA512

      c71f54b571e01f247f072be4bbebdf5d8410b67eb79a61e7e0d9853fe857ab9bd12f53e6af3394b935560178107291fc4be351b27deb388eba90ba949633d57d

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      1KB

      MD5

      a266bb7dcc38a562631361bbf61dd11b

      SHA1

      3b1efd3a66ea28b16697394703a72ca340a05bd5

      SHA256

      df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

      SHA512

      0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

      Filesize

      342B

      MD5

      77b0727dc243b09e317201d2f9b53171

      SHA1

      30b08fa3021fa1ae6cc6e5cbd77d3b920163cd59

      SHA256

      a12947857f20b92063b16f12469fbfb61babd28d66e0396dd6a89f0b31d4f03d

      SHA512

      c6330ece51eb38fe5154252ba5ab8e2389dd65b2e6a4a4e123e70fff4fabf10df769143ea9230e5e9b7d5d0c0f05b537247c2d75645a085460386a890867489d

    • C:\Windows\System32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

      Filesize

      242B

      MD5

      2879fd17356cbd83ba7628384021801b

      SHA1

      7f0b84d78ea294df227be96b33bcbd0a37186c23

      SHA256

      28c142e311468eee1c0d4be2b530be68f3e852bc9332f00305739354941c5353

      SHA512

      84fe56230e1fc52f16bbe0793c43c618626f2d9e36b32da1248d11ddf3231346ed735296e9ec9a3e07f4d5ba115454355428fbbe8ed1a5e228987189c03737c6

    • C:\Windows\Temp\CabA0A6.tmp

      Filesize

      29KB

      MD5

      d59a6b36c5a94916241a3ead50222b6f

      SHA1

      e274e9486d318c383bc4b9812844ba56f0cff3c6

      SHA256

      a38d01d3f024e626d579cf052ac3bd4260bb00c34bc6085977a5f4135ab09b53

      SHA512

      17012307955fef045e7c13bf0613bd40df27c29778ba6572640b76c18d379e02dc478e855c9276737363d0ad09b9a94f2adaa85da9c77ebb3c2d427aa68e2489

    • C:\Windows\Temp\TarA2EE.tmp

      Filesize

      161KB

      MD5

      73b4b714b42fc9a6aaefd0ae59adb009

      SHA1

      efdaffd5b0ad21913d22001d91bf6c19ecb4ac41

      SHA256

      c0cf8cc04c34b5b80a2d86ad0eafb2dd71436f070c86b0321fba0201879625fd

      SHA512

      73af3c51b15f89237552b1718bef21fd80788fa416bab2cb2e7fb3a60d56249a716eda0d2dd68ab643752272640e7eaaaf57ce64bcb38373ddc3d035fb8d57cd

    • \Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • \Users\Admin\AppData\Local\Temp\db.dll

      Filesize

      52KB

      MD5

      1b20e998d058e813dfc515867d31124f

      SHA1

      c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

      SHA256

      24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

      SHA512

      79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

    • memory/836-74-0x0000000001220000-0x0000000001292000-memory.dmp

      Filesize

      456KB

    • memory/836-73-0x0000000000880000-0x00000000008CD000-memory.dmp

      Filesize

      308KB

    • memory/836-62-0x0000000000880000-0x00000000008CD000-memory.dmp

      Filesize

      308KB

    • memory/836-77-0x0000000000880000-0x00000000008CD000-memory.dmp

      Filesize

      308KB

    • memory/836-65-0x0000000000880000-0x00000000008CD000-memory.dmp

      Filesize

      308KB

    • memory/836-63-0x0000000001220000-0x0000000001292000-memory.dmp

      Filesize

      456KB

    • memory/1240-71-0x0000000000780000-0x00000000007DE000-memory.dmp

      Filesize

      376KB

    • memory/1240-70-0x0000000001EC0000-0x0000000001FC1000-memory.dmp

      Filesize

      1.0MB

    • memory/1640-75-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-85-0x0000000000300000-0x000000000031B000-memory.dmp

      Filesize

      108KB

    • memory/1640-86-0x0000000002F30000-0x000000000303A000-memory.dmp

      Filesize

      1.0MB

    • memory/1640-89-0x0000000000320000-0x0000000000340000-memory.dmp

      Filesize

      128KB

    • memory/1640-91-0x0000000001C60000-0x0000000001C7B000-memory.dmp

      Filesize

      108KB

    • memory/1640-84-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-79-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-78-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-72-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-67-0x0000000000280000-0x00000000002F2000-memory.dmp

      Filesize

      456KB

    • memory/1640-66-0x0000000000060000-0x00000000000AD000-memory.dmp

      Filesize

      308KB

    • memory/1640-244-0x0000000002F30000-0x000000000303A000-memory.dmp

      Filesize

      1.0MB